After you add the gadget to your homepage, you can collapse any of your visible gadgets into the Compound gadget via the settings. Once they're added, you can peruse the group by tabs. If you've currently got several gadgets covering the same beat, the Compound gadget might be the perfect way to pull them together and declutter your iGoogle homepage. Of course, you can also add full-on tabs if you need a bit more room to organize and categorize your gadgets.